This European Standard specifies a method for the determination of pH within the range pH 2 to pH 12 in a suspension of sludge, treated biowaste or soil in either water (pH-H2O), or a 0,01 mol/l calcium chloride solution (pH-CaCl2).This European Standard is applicable to sludge, treated biowaste and fresh or air-dry soil samples.
EN 15933:2012 history
2012EN 15933:2012 Sludge, treated biowaste and soil - Determination of pH